masterへのcommit、pushの禁止。以下のファイルをproject配下、 .git/hooks/ の中に入れる

pre-commit

#!/bin/sh

# if the branch is master, then fail.

branch="$(git symbolic-ref HEAD 2>/dev/null)" || \
       "$(git describe --contains --all HEAD)"

if [ "${branch##refs/heads/}" = "master" ]; then
  echo "Do not commit on the master branch!"
  exit 1
fi

pre-push

#!/bin/sh

# if the branch is master, then fail.

branch="$(git symbolic-ref HEAD 2>/dev/null)" || \
       "$(git describe --contains --all HEAD)"

if [ "${branch##refs/heads/}" = "master" ]; then
  echo "Do not commit on the master branch!"
  exit 1
fi